Improvement in connecting the tubes with the heads of sdeface-condensees



@uiten tat-g5 gatnt @ffice HORATIO ALLEN, or NEW YORK, N

Letters Patent No. 73,221, dated January 14, 1868.

IMPROVEMENT IN GONNEGTING THE TUBES WITH THE EADS 0I SURFACE-CONDENSERS.

@its .flnhulc nfnnh it in tigen tettett annt mit linking putt at tigesmut.

`TO ALL WHOM IT MAY CONCERN:

Be it known that I, IIORATIO ALLEN, ofthe city and State of New York,have invented Improvements in Tube-Joints; and I do hereby declare lthatthe following is a full and exact description thereof, reference beinghad to the accompanying drawings, and tothe letters of reference markedthereon.

In tubular surface-condensers, and other instruments where thecombination of the tubes with the tube-head allows a movement of thetube in the joint, it sometimes occurs that the tube, underl the effectof successive expansions and contractions', will have a continuousmovement in one direction, which 4may cause it to lea've the head. Theobjects of my present improvements are either to cause the expansion totake. place only in one head, or tomake sueh provision that the tubecannot leave either head under the influence of expansion andcontraction.

I effect the first object by making one tube-head of greater thicknessthan the other. This is shown in tig.

1. L and M are the two headsf the head L is thicker than the head M,(say, one, one and a halfv inch thick the other one, one inch thick.)There will then be greater resistance to movement in the thick head, andconsequently all the movement from 'expansion and contraction will he inthe thin tube-head, and the en'd of the tube in the thick head will haveno movement in the head. To effect the second object, I make provision,by cutting in each-end of' the tube one or more tongues, aboutthree-sixteenths wide and three-sixteenths long, and after the tube isinplaee, bending out the tongues into a bell-mouth form. I

Figure 1 or 2 represents a tube in its tube-heads, with the bell-mouthtongues. A is the tube, e c the tube-heads; B is the packing, of anykind that makes thejoint tight; m m are tongues cut into the end of thetube, about three-snteenths wide and vthree-sixteenths long. After thetube is in its place the tongues m m are bent outward, as represented.Ample allowance for range of expansion and contraction is made in thelength between the tongues at one end and the tongues at the other end.`When a. tube is to be removed, a. few slight blows on 'the tongue. willrestore it into its original position as part of thc tube; and when thetube is replaced, a slight action on the tongue will bend it out to thebell-mouth for'm.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. Making one of the tube-heads of greater thickness than the other, inthe manner and for the purpose herein described.

I cl'aimcutting, and bending into bell-mouth form, tongues in the endsof the tubes, forthe purpose and substantially in the'imanuer hereindescribed.

' HORATIO ALLEN.

Witnesses:

CEAS. A. TAYLOR, FRED. W. CHILD.

